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@ 2012-10-21T10:49:02Z

<?php
$challenge = function()
{
        $f = Common::getGetString('eval');
        $f = str_replace(array('`', '$', '*', '#', ':', '\\', '"', "'", '(', ')', '.', '>'), '', $f);
 
        if((strlen($f) > 13) || (false !== strpos($f, 'return')))
        {
                die('sorry, not allowed!');
        }
 
        try
        {
                eval("\$spaceone = $f");
        }
        catch (Exception $e)
        {
                return false;
        }
 
        return ($spaceone === '1337');
};

Output
Performance
VLD
References
Branches

strpos: documentation ( source)
str_replace: documentation ( source)

preferences:dark modelive preview

36.61 ms | 402 KiB | 5 Q